Car heater



X 1,627,560 May 10 192.7- H. HELLWEG CAR HEATER vFiled Jan. 17 `1924 2 smeris-sheet 1 ATTORNEYS May 10 1927 H. HELLWEG CAR HATER Filed Jan 17 1924 2 Sheets-Sheet .2

Y 4 ATTORNEYS;

Qian

Patented Maylo, 1927-.' V

UNITED STATES 1,627,560 PATENT OFFICE.

HENRY HELLWEG, F MILWAUKEE, WISCONSIN, ASSIGNOR-`I`O HELZEN CORPORATION, OF MILWAUKEE, WISCONSIN, A COBIORATION 0F WISCONSIN.

CAR HEATER. v

Application filed January 17, 1924. Serial No. 686,883.

This invention relates to heaters whichA utilize the heat of the exhaust gasesfrom automobile en ines to heat air fori warmlng the interior o automobiles in cold weather.

b- The main objects of the inventionareto provide a heater which can be eas1ly` installed in place of the usual exhaust man1. fold with which a car, such as a Ford car,

. is equipped, which will take in and eiecu tively heat fresh regulated control into the can; to prevent leakage of exhaust gas or admisslon of Idust into the air-heating space ofthe heater and its delivery therefrom into the car; to prq- I5 vide against overfheating the exhaust man1- fold, vparticularly in ,connection with a hotspot intake manifold and thus prevent warped engine valves, reduce back pressure on the engine, deposit of carbon 'and consumption of fuel-and cause the engine vto run smoother; to provide not only for better regulation of v the car, but also of the heating of -the manifold itself; and generally to 'improve the construction and operation ofheaters of this class. f

The invention consists in the construction, 'arranfrement and combination of parts as hereinafter particularly described and pointed out in the claims.

In the accompanying drawing like characters designate the same parts in the several figures.

Figure -1 is a a5 embodying the invention as apphed to an automobile engine, such as the' yen ine .of a Ford car; Fig. 2 is a plan view oft cheater and a part of the engine' tol which it is ap: plied; Fig. l3 is an enlarged cross section 4o of the heater on lthe line 3-'3, Fi 1; Fig. 4 is a partial cross section on the ine 4--4, Fig. 1; Fig. 5 is a sectional detail view of a detent for holding the valves atthe rear end of the heater in adjusted position' Fig.

6 is -an enlarged vertical longitudine section of the heater on theline 'ti-6, Fi s. 3

and 7; Fig. 7 is a horizontal section o the heater on the line 7-7, Figs.` 3 and 6; and

Fig. 8 is a vertical longitudinalsection on no the line 8-8, Figs. 3, 4 and 7.

The heater as constructed for a four-cylinder internal combustion engine such' as the engine of a Ford car, comprises an exhaust manifold having a longitu inal exhaust gas sa passage 1,'and parallel air heating passages air and deliver it under" the heated air 'admittedinto side elevation of a heater 2, formedy on opposite sides thereof by side walls 3 and 4, cast or formed integrally with v-top and .bottom walls 5 and 6.

On the-under side theexhaust manifold and heat er is formed integrally with down- Wardly and laterally extending branches 8, for connection with the exhaust rts of the engine, in the usual or any suita le manner.

At its .rear end the gas assage 1 is ex-l tended in' a downwardly angz'rearwardly .in- 65 clined vnecky 10, which is threaded for connection therewith of an exhaust pipe lead. ing tothe muffler. y,

Atv the frontl and rear` ends Aof the mani-1' y fold and heater the passages2 areextended 70. and communicate with each other lbe ond'v the ends vfof the gas passave 1. At the ront end the heater is ,providedl with a 'Enfin i mouth or air intake 12, which islocate behind and adjacent to 'the fan 13, as shown 75 in Figs. 1 and 2, in communication with the frontends of the passages 2. 'This mouth `or intakeis preferably cast or formed separate from the manifold and heater, and is fastened thereto by screws 14 fas shown in 80` Figs. '6., 7 and 8. Attheir rear ends the passages 2 open into a register' box and valve case 16, which is formed with openings in its upperand-lower sides for the delivery or discharge of heated air into or outside of a car. This box or case vis preferably cast or formed separate from the body of the manifold and heater, and Vis fastened thereto, as shown inFigs. 1, 2 :and 7, by outwardly projecting anges 90 or ears 4and screws 17. The `upper wall 18 of the box `or 'case 16 is inclined downwardly Iand rearwardly, as shown in'Figs.L 1, 6 and 8,'v to correspond with the. inclination of the footboard 19, into an openin in which it is fitted, as shownin Fig. 1. The downwardly inclined wall 18 in which openings are made for delivering heated air into the'car, forms agr-ate, as `shown in Fig 2. Twoindependently operable dampers or 10 leaf valves 21 and 22 are pivotal'ly mounted in the rear end of the box or case 16- on arallel horizontal pins 23, having ,bearings in the'side walls'of the box or case, as shown in Figs. 6, 7 and 8. Each pin 23 is extended 105 at one end .beyond `the side fof `the box or 'case, end pnovided with an operating lever or arm-24, the upper end .of which is preferably extended and serrated `as shown, to

facilitate lits operation by foot, 'Il hesewop- 110' wardly and, laterallgi @rating levers or arms 24:,are located on opposite sides of the box or case 16, so that they can be easily operated independently of each other for separately adjusting the dampers or valves 21 and `22. Each lever or arm 24 is provided with a detent forholding it and the damper or valve with which it is connected, in adjusted-position, This detent preferably consists asshown 1n F 1g. 5, of a ball 26, loosely yconfined in a transverse socket 27', formed in the extended lower end of the lever or army 2land yieldingly pressed and held by a spring adjacent side wall of the box or case 16, which may if desired,` be formed at suitable intervals in the path of the lballwith shallo7 depressions or seats to hold the damper y or valve in `di`erent positions to which it may be adjusted.

The walls 4t of the exhaust gas passage 1 are. preferably formed with longitudinal heat radiating ribs or wings 30, projecting therefrom into the air passages 2.

A hot-spotintake manifold v32 is preferably castor formed integrally with the exhaust manifold and heater, so that the,

cooling effect of the air iowiug through the passages 2 on the adjoining parts of the manifolds, particularly in hot or warm weather, will prevent overheating of the intake manifold 32, and thereby reduce lthe consumption of fuel, and cause the engine to run smoother and with greater efficiency.

The intake .manifold is formed with upprojecting branches 33, egrally with the lower wall 6 of the xhaust manifold and heater, thus providin so called hot-spots for imparting heat t ,theifuel gas or mixture as it is supplied to the fengine cylinder, the branches of the intake manifold being connected in the usual or any suitable manner with the admission ports of the engine.kv

which are Joined /i The upper wall of the intake manifold 32 is integrally joined with the intermediate downwardly extending branches 8 of the exhaust manifold, thereby providing addi tional hot-'spots for heating the fuel gas or mixture on its way to the branches 33 and thence to the inlet ports of the engine cylinders.

The manifoldsv and heater are detachably fastened to the cylinders or cylinder block of an engine 35, as shown in Fig. 1,V by clamps 36 having seats 37 on the outer sides of the manifold branches 8 and 33 and connected between their ends with the cylinders y or cylinder block by bolts 38.

In` the operation of the heater, when the engine with which it is connected is run-- ning and either or both valves 21 and 22 is open, air is forced by the fan l13 into the flaring mouth o r intake 12 and forced by the fan 13 through the passages 2 in lContact with the walls 4 and the heat radiating ribs or 28 against the wings 30, from which it absorbs heat produced by the exhaust gases from the engine flowing through the passage 1. If both valves 21 and 22 are turned down, as shown in Fig. G and indicated by dotted lines in Fig. 1, the heated air will be discharged freely through the register box 16 and the grate 18 on the upper side thereof, into the car.

In hot weather both valves 21 and 22 may be turned up, as shown in Fig. 8, so as to close the openings through the grate 18 and direct all the heated ai-r discharged from `the passages 2 downwardly through the opening in the under side of the register box 16 below the Hoor of the car.

In moderate or cool weather, the valves may be adjusted to different positions so as to direct apart uonly of the heated air from the passages 2 through the grate 18 into 7" the car, 0r to direct a part only through the opening-in the under side of the register box 16, as by completely closing one valve and partially closing or opening the other.

To quickly warm up the engine for starting, particularly in cold wea her, both valves 21 and 22 may be closed, sa/v as to prevent the flow of air through the passages 2 and contine all'the heat developed by the exhaust gases in their passage through the heater between the walls 3 and 4, and utilize it to the fullest extent for heating'the fuel gas or mixture supplied to the engine through the branches 33 of the hot-spot intake manifold 32.

When the engine is warmed up and started, the valves are 'set to discharge all "or a part of the air heated in the passages 2 through the ygrate or openings in the upper side or through the opening in the underside of the register box 16, or partly through the upper and partly through the lower opening, according to temperature conditions.

In warm or hot weather, when both valves are turned up, as shown in Fig. 8, the forced draft of fresh airv through the passages 2 will rapidly take up and carry off the heat imparted by the exhaust gases from the engine to the Walls 4 and the adjoining branches 8 and 33 of the exhaust and intake manifolds, heating of the intake manifold andl undue expansion and rarefaction of the fuel gas or mixture withoutafl'ecting the advantage derived from the use of the hot-spot manifold under other conditions, as for heating the fuel gas or mixture in warming up and starting the engine, or for running in cold weather. v

Various modifications in the construction and arrangement of parts of the device may be made without departure from the principle and scope ofthe invention in the following claims.

I claim: 1 y

thereby preventing the overf as defined f,

' 'through said 'device in a direction longitudinally thereof, and means-,for controlling the 1. A device of the character described comprising an exhaust manifold having a longitudinal v exhaust gas passage andv an' air-heating passage adjoining the exhaust gas passage Aand having an intake at the 4front end and an outlet .at the` rear end to haust and intake manifolds.,

2. A device of the character described comprising an exhaust manifold having a longitudinal exhaustgas passage provided with depending branches, an intake manifold having branches jolned integrally to the lower wall of the exhaust-gas passage, theupper wall of the intakev manifold 'being joined integrally tdintermediate branches of the exhaust manifold, an air heating passage adjacent the hot-spot connections between the exhaust and intake manifolds, said air passage being partitioned from both the exhaust-gas passage and the intake mani-` fold and providing' for the flow of air flow of air through the airvheating passage wherebyoverheating of the fuel gas or mixture flowing through the intake manifold g may be prevented.

3. In` a deviceof the character described, a casing comprising top, bottom, and side walls, partitions arranged intermediate said `side walls and in spacedrelation with respect thereto to provide an exhaust manifold` Aextending longitudinally of said casing and air-heating. passages at each side of said exhaust manifold, means adapted to connectsaid exhaust manifold tothe exhaust ports of aninternal combustion engine, said device being provided with an intake manifold associated with said exhaust manifold whereby exchange ofheat -between said manifolds is readily effected, and means associated with said air-heating passages and adapted and arranged to control the flow of air through the latter and the rate of the exchange of'heat between said manifolds.

y 4. In a device of the character described, a casing comprising top, bottom, and side walls, partitions cast integrally with said :seo 3 ltop and bottom Walls and arranged interme- 'diate said side walls and in spaced relation with respect thereto to provide an exhaust manifold extending longitudinally of said casing and air-heatln assages ateach.l side of said exhaust manioid, means adapted to connect said exhaust manifold to the exhaust ports ofan internal combustion engine, said device being provided with an intake mani# fold associated with said exhaust manifold whereby exchange of heat between said manifolds is readily effected, and means associated with said air-heating passages and adapted and `arranged to control the flow of air through the latter and the rate of the exchange of heat between said manifolds'.

5. In a device'of'the character described,

a casing comprising top, bottom, and, side walls, partitions cast integrally with said top and bottom 'walls and arranged intermediate said side walls and in spaced relation with respect thereto to provide an exhaust manifold extending longitudinally of saitl casing andair-heating passages at eachs'ide of said exhaust manifold, said partitions being provided with heat-radiating ribs extending laterally with respect thereto and.

into said air-heating passages, means .adapted to connect said exhaust manifold to the exhaust ports of an internal combustion engine', said device being' provided with an in take `manifold Iassociated with said exhaust manifold whereby exchange of heat vbetween said manifolds is readily-effected, and means associated-with said air-heating passages and adapted land arranged to controlv the flow of air through the latter and the rate of the exchange of heat between said manifolds.

6. In a device ofthe character described, a. casing provided with an exhaust passage extending longitudinally thereof, an intake manifold associated with said casing, and an exhaust' conduit communicating with saidexhaust passage,- said manifold and said conduit havin a common heat-conducting wall whereby said wall permits ready transfer of heat from said conduit to said manifold, said casing being further provided with an air passage extending longitudinally thereof and being partitioned from both said exnature. y

HENRY HELLWEG. 

